There is a nail polish company that has provided a certification claiming that wudhu is permissible while wearing its nail polish if the nails are rubbed for 10 seconds under water prior to doing wudhu. The company name provides the water permeability test results on their website. Is it permissible to do wudhu with this kind of product?
If the nail polish does not prevent water from reaching the nails it does not affect wudhu, however, determining if this is in fact the case is the responsibility of the person themselves and the person cannot rely on the permeability test of the company as proof. We do not know of any nail polish that is permeable to water such that it would be permissible during wudhu.